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Stockholders' Equity and Stock-Based Compensation Plans - Fair Value of Liability Cash-Settled Stock Appreciation Rights (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Balance at January 1	$ 0
Compensation charge for the period	0.1
Balance at September 30	$ 0.1

X

- Definition

Change in fair value of liability cash-settled stock appreciation rights.

+ References

No definition available.

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- Definition

Fair value of liability cash-settled stock appreciation rights.

+ References

No definition available.

+ Details

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